In Denver, Matt Duchene scored twice and Semyon Varlamov stopped 39 shots, helping Colorado hold off Dallas and improve to 6-0 in Patrick Roy’s first season on the bench.

Jan Hejda also scored as the Avs moved within a win of tying the franchise’s best start. The organization was 7-0 in 1985-1986 as the Quebec Nordiques.

By winning six straight, Roy ties the NHL record for victories to start a coaching career. He shares the mark with Mario Tremblay, who won his first six games with Montreal in 1995-1996, a team Roy played for before being traded to the Avalanche later that season.

Rich Peverley and Cody Eakin had goals for the Stars, who outshot the Avs 41-26 in dropping their second straight game on the road.

SENATORS 4, COYOTES 3, OT

In Glendale, Arizona, Cory Conacher scored at 2:48 of overtime, while Jason Spezza completed a natural hat-trick to erase a two-goal deficit as Ottawa ended a four-game losing streak with their win over Phoenix.

Phoenix took a 2-0 lead on quick goals by Rob Klinkhammer and Radim Vrbata in the second period, but the Senators rallied behind Spezza’s fifth hat-trick.

Mike Ribeiro tied it with just over three minutes left with his first goal of the season, redirecting a shot by Oliver Ekman-Larsson on a power play to send the game to overtime.

Conacher ended the game by setting up in front and one-timing Marc Methot’s pass from the left circle past a diving Mike Smith.